The 6ES7194-2MH20-0AA0 is a 2-meter shielded PROFINET bus cable with straight M8 plugs at both ends—the standard within-enclosure daisy-chain link for ET 200AL distributed I/O. Plug one end into the bus-out port of the first module, the other into the bus-in port of the next. Green PUR jacket, dual-shield construction, 4-pole M8.

Why choose the 2m variant over the shorter or longer versions?

Two meters is the sweet spot for within-enclosure inter-module bus links. It is long enough to route cleanly around wire duct and cable management—avoiding the tight-radius bends of a 15cm cable stretched between non-adjacent modules—and short enough to avoid coiling excess. If your modules are directly adjacent (under 200mm apart), use the 15cm variant for a cleaner panel layout. If the modules span opposite ends of a wide enclosure or sit in separate cabinets, step up to 5m or 10m.

Is this the most cost-effective ET 200AL bus cable?

Within the straight-connector bus cable family, the 2m length provides the best balance of usability and cost—it covers the most common installation scenarios without excess material. Angled variants cost slightly more due to the more complex connector overmold tooling. If your enclosure depth allows straight connectors, this is the economical choice.

Frequently Asked Questions

What is the minimum bend radius for this cable?

Maintain 100mm bend radius for flexing applications (cable carriers, articulated machine arms) rated for 1 million cycles. For static routing within a control cabinet, 50mm is the minimum bend radius. Exceeding the minimum causes the twisted-pair geometry to distort, degrading the 100-ohm differential impedance and increasing bit error rates on the PROFINET link.

Can I daisy-chain power through this bus cable?

No. This is a PROFINET bus cable—green jacket, shielded 2×2 twisted pairs, carrying 100 Mbit/s Ethernet signals. 24VDC power uses a separate gray-jacket cable with unshielded 4×0.50mm² conductors. The ET 200AL system physically separates power and communication into two connector systems sharing the same M8 form factor. Never cross-connect.